Jeans mass
= Jeans mass
{c}
{title2=$M_J$}
{wiki}
The <Jeans mass> is the characteristic gas <mass> above which self-gravity overcomes <pressure> support. Up to the convention used to define the collapsing region,
$$
M_J\propto\frac{c_s^3}{G^{3/2}\rho^{1/2}}
\propto T^{3/2}\rho^{-1/2}
$$
for an <ideal gas> of fixed composition.